Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7973638 | Materials Science and Engineering: A | 2018 | 23 Pages |
Abstract
Improving room temperature ductility and formability is a bottleneck for a wide industrial application of Mg alloys, but even the mechanism for the effect of alloying elements on the deformation behavior of Mg is not clearly known. Here, using a molecular dynamics simulation, we clarify the role of alloying elements in improving the room temperature ductility of Mg alloys: Solute atoms have stronger dislocation binding tendency and solid solution strengthening effect on basal slip planes than on non-basal slip planes, reduce the anisotropy in the critical resolved shear stress between slip systems, and eventually improves the room temperature ductility. We predict that any solute elements with a size difference from Mg can improve the room temperature ductility, once the alloying amount is carefully controlled. By proving the validity of the prediction experimentally, we provide a new guide for designing Mg alloys with improved room temperature ductility and formability.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Ki-Hyun Kim, Ji Hyun Hwang, Hyo-Sun Jang, Jong Bae Jeon, Nack Joon Kim, Byeong-Joo Lee,